The MM 50 iP is a Stereo Headset for Apple I Phone which allows the iPhone users to have excellent communication capability with top of the class mobile music experience. Based on the successful launch and the popularity of the iPhone , we now introduce a headset tailormade for the iPhone and iPod. Thanks to Sennheiser's expertise as a global leader in electro acoustics, the headset reproduces outstanding, professional quality acoustics to ensure you gain maximum pleasure from your iPhone and iPod.You can even choose your ideal size ear sleeve (3 sizes) for an optimum fit and get high isolation against environmental noise as well as excellent bass response.